sleep(3) - phpMan

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SLEEP(3)                   Linux Programmer's Manual                  SLEEP(3)



NAME
       sleep - Sleep for the specified number of seconds

SYNOPSIS
       #include <unistd.h>

       unsigned int sleep(unsigned int seconds);

DESCRIPTION
       sleep()  makes  the  calling  process sleep until seconds seconds have elapsed or a
       signal arrives which is not ignored.

RETURN VALUE
       Zero if the requested time has elapsed, or the number of seconds left to sleep,  if
       the call was interrupted by a signal handler.

CONFORMING TO
       POSIX.1-2001.

BUGS
       sleep() may be implemented using SIGALRM; mixing calls to alarm(2) and sleep() is a
       bad idea.

       Using longjmp(3) from a signal handler or modifying the handling of  SIGALRM  while
       sleeping will cause undefined results.

SEE ALSO
       alarm(2), signal(2), signal(7)

COLOPHON
       This page is part of release 3.22 of the Linux man-pages project.  A description of
       the project, and information about reporting bugs, can be found at  http://www.ker-
       nel.org/doc/man-pages/.



GNU                               2008-07-04                          SLEEP(3)

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